He raised his cup to the empty room. "To the standards that outlast us."
Version 9.0 includes 105 pure fluids , 5 pseudo-pure fluids (like air), and supports mixtures with up to 20 components .
Used for specific international standard equations, such as R-123. nist refprop 9
: Serving as a reference library for mass flow meters and controllers to allow field adjustments for different gas types.
Developed by the National Institute of Standards and Technology (NIST), REFPROP 9 is software designed to compute the thermodynamic and transport properties of industrially important fluids, with a focus on refrigerants, hydrocarbons, and cryogenic fluids. He raised his cup to the empty room
Liquid nitrogen, helium, argon, oxygen, and hydrogen.
REFPROP 9 can calculate dozens of distinct thermophysical properties across the subcooled liquid, supercritical, and superheated vapor regimes. Thermodynamic Properties Pressure ( ), Temperature ( ), and Density ( Enthalpy ( ), Entropy ( ), and Internal Energy ( Specific heat capacities at constant pressure ( Cpcap C sub p ) and constant volume ( Cvcap C sub v Speed of sound Joule-Thomson coefficients Transport Properties Dynamic viscosity Thermal conductivity Surface tension (for liquid-vapor interfaces) The Science Behind the Software : Serving as a reference library for mass
REFPROP 9 expanded significantly on its predecessors, offering calculations for pure fluids as well as complex, multi-component mixtures. 1. Pure Fluids
One of the most requested features in earlier versions was better transport property predictions. REFPROP 9 incorporated the latest correlation models for the viscosity and thermal conductivity of refrigerant mixtures, including the effect of critical enhancement (the anomalous increase in properties near the critical point).